POV-Ray : Newsgroups : povray.general : File Format Server Time
9 Aug 2024 09:02:29 EDT (-0400)
  File Format (Message 11 to 16 of 16)  
<<< Previous 10 Messages Goto Initial 10 Messages
From: Warp
Subject: Re: File Format
Date: 12 Sep 2000 05:10:33
Message: <39bdf309@news.povray.org>

: Can you change the output file format in pov from a *.bmp to a *.jpg or
: *.gif with out haveign to use another program to do that ???

  Believe me: You don't want that.

  Not in the long run anyways.

  ("Damn!!! 50 hours of rendering and the image looks like crap because of
too low jpeg settings!!!")

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):_;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/


Post a reply to this message

From: Chris Huff
Subject: Re: File Format
Date: 12 Sep 2000 07:22:20
Message: <chrishuff-586515.06241212092000@news.povray.org>
In article <39bdaa56@news.povray.org>, "Thorsten Froehlich" 
<tho### [at] trfde> wrote:

> This is by design and it is unlikely POV-Ray will ever support JPEG as
> output format because it is not lossless.

Hmm, isn't there a JPEG-2000 standard which supports lossless 
compression? I remember reading something about it, but I haven't seen 
anything that can read or write them.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

<><


Post a reply to this message

From: Thorsten Froehlich
Subject: Re: File Format
Date: 12 Sep 2000 11:07:03
Message: <39be4697$1@news.povray.org>
In article <chrishuff-586515.06241212092000@news.povray.org> , Chris Huff 
<chr### [at] maccom>  wrote:

> Hmm, isn't there a JPEG-2000 standard which supports lossless
> compression? I remember reading something about it, but I haven't seen
> anything that can read or write them.

Exactly, libjpeg doesn't support it, and there is no information if it ever
will...


     Thorsten


____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

Visit POV-Ray on the web: http://mac.povray.org


Post a reply to this message

From: Gilles Tran
Subject: Re: File Format
Date: 12 Sep 2000 12:04:26
Message: <39BE5382.B01A3645@inapg.inra.fr>
Warp wrote:

>   Believe me: You don't want that.
>   Not in the long run anyways.
>   ("Damn!!! 50 hours of rendering and the image looks like crap because of
> too low jpeg settings!!!")

To be frank, I've never felt this was a really good reason. After all, there
are already an infinite number of ways this kind of thing can happen (like
this one : launch a 48-hours long batch rendering with "Continue" enabled and
find that nothing happened because small test renders had been already
created...).
Also, JPG could be implemented like some sort of post processing.
post_process{jpeg_output{quality, keep_original}}
JPG output support is certainly not on my priority list, but when doing lots
of test renders (and when one wants to keep the results for comparison or
historical purposes) it would be an interesting feature.

G.


Post a reply to this message

From: ingo
Subject: Re: File Format
Date: 12 Sep 2000 12:29:49
Message: <8FADBE9C4seed7@204.213.191.228>
Gilles Tran wrote:

>Also, JPG could be implemented like some sort of post processing.
>post_process{jpeg_output{quality, keep_original}}
>

You can do that with the Post_Scene_Command.

Ingo

-- 
Photography: http://members.home.nl/ingoogni/
Pov-Ray    : http://members.home.nl/seed7/


Post a reply to this message

From: Jon A  Cruz
Subject: Re: File Format
Date: 17 Sep 2000 01:33:58
Message: <39C4578F.92AB025C@geocities.com>
Thorsten Froehlich wrote:

> Exactly, libjpeg doesn't support it, and there is no information if it ever
> will...

I had heard rumblings also that it might contain non-free IP (ala GIF patented
compression)


Post a reply to this message

<<< Previous 10 Messages Goto Initial 10 Messages

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.